Popliteal Cyst - Baker Cyst

How is the condition diagnosed?

Diagnosis is primarily made by the medical history and physical exam of the knee. Fluid may be withdrawn from the cyst. This can often confirm the diagnosis and reduce or stop symptoms. The cyst may also be studied with imaging tests, such as ultrasound, MRI scans, or joint X-rays. These tests may confirm the diagnosis, look for arthritis or injury to the knee, and help rule out other causes for the bump in the back of the knee.